May 29, 2007 Without going through the hassle of removing bottle-tops, staff at security checkpoints are unable to see the difference between a bottle of drinking water and a potential molotov cocktail - the solution has commonly been to prevent people from passing through checkpoints with bottles. Now there's a device that can instantly detect whether a bottle contains a potential threat liquid without taking the top off. The Senicon is already in use in Japan's Kansai International Airport - and it's currently under review by the U.S. Department of Homeland Security for use in airports and other areas under threat of terrorist attacks.